Remove the dinner rolls from their tin. Cut long ways down the middle so that you have a top and a bottom. Put bottom half of rolls back in to tin. Mix butter, Worcestershire, poppy seeds, and mustard in a bowl. Spread mixture on bottom layer. Layer bottom half with ham, then Swiss, then ham again. Spread mixture on top and bottom of top layer. Place top layer back in tin so as to cover the ham and Swiss. In a 350 degree oven, back until cheese has melted and
the tops of the rolls are crisp to the touch. Remove and cut along the pre-cut bun marks. Place a toothpick in each and serve at parties